﻿using System;
using System.Data.Objects.DataClasses;
using System.Globalization;
using System.Windows.Data;
using Dispatcher.Helpers;
using Repository;

namespace Dispatcher.Converters
{
    /// <summary>
    /// Lazy Load Converter.
    /// </summary>
    public class ComboItemConverter : IValueConverter
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="ComboItemConverter"/> class.
        /// </summary>
        /// <param name="modelContainer">The model container.</param>
        public ComboItemConverter(ModelContainer modelContainer)
        {
            ModelContainer = modelContainer;
        }

        /// <summary>
        /// Gets the model container.
        /// </summary>
        public ModelContainer ModelContainer { get; private set; }

        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value produced by the binding source.</param>
        /// <param name="targetType">The type of the binding target property.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var entityObject = value as EntityObject;
            if (entityObject != null)
            {
                var setName = entityObject.EntityKey.EntitySetName;
                var set = ModelContainer.GetObjectSet(setName);
                return set;
            }

            return null;
        }

        /// <summary>
        /// Converts a value.
        /// </summary>
        /// <param name="value">The value that is produced by the binding target.</param>
        /// <param name="targetType">The type to convert to.</param>
        /// <param name="parameter">The converter parameter to use.</param>
        /// <param name="culture">The culture to use in the converter.</param>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}
